Haemophilia, a $X$-linked recessive disease is caused due to deficiency of
Blood plasma and vitamin-$K$
Blood platelets and haemoglobin
Lack of clotting material and vitamin-$K$
All of the above
Given below is a pedigree chart showing the inheritance of a certain sex- linked trait in humans.
The trait traced in the above pedigree chart is
The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.
A person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin. This heterozygous condition is called
If a colour blind lady marries a normal man, their children will be
Given below is pedigree chart showing the inheritance of a certain trait in human. Select the correct option for the given chart